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Microstructure evolution of delta-processed IN718 during holding period after hot deformation

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Abstract

Two IN718 alloys with different initial δ phase contents have been used to study the microstructure evolution during the holding period after the hot deformation by the heat treatment at 950–1040 °C after deformation at temperature of 950 °C and strain rate of 0.005 s−1. The results indicate that the grain growth is restrained due to the pinning effect of δ phase. The activation energy of grain growth for the alloys with initial δ phase content of 0 and 8.14 wt% in the heat treatment after hot working were 273.8 and 882.8 kJ/mol, respectively. In addition, the dissolution of δ phase occurred during the heat treatment after the hot deformation, and the δ phase dissolved largely as the temperature is higher than 980 °C. Therefore, the heating and deformation temperature should be in the range of 950–980 °C for the Delta Process and multi-stage hot working processes.

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References

  1. Ruiz C, Obabueki A, Gillespie K (1992) In: Evaluation of the microstructure and mechanical properties of Delta processed alloy 718. TMS (The Mineral, Metals & Material society), Warrendale

  2. Dix AW, Hyzak JM, Singh RP (1992) In: Application of ultra fine grain alloy 718 forging billet. TMS (The Mineral, Metals & Material society), Warrendale

  3. Bhowal PR, Schirra JJ (2001) In: Full scale Gatorizing™ Of fine grain Inconel718. TMS (The Mineral, Metals & Material society), Warrendale

  4. Cai DY et al (2007) Mater Charact 58:220

    Article  CAS  Google Scholar 

  5. Desvallées Y, Bouzidi M, Bois F, Beaude N (1994) In: Delta phase in Inconel718: mechanical properties and forging process requirements. TMS (The Mineral, Metals & Material society), Warrendale

  6. Zhang Y, Huang XB, Wang Y, Yue W, Hu Z (1997) In: Delta phase and deformation fracture behaviour of Inconel 718 alloy. TMS (The Mineral, Metals & Material society), Warrendale

  7. Yoshida H, Hatta T, Hironaka T, Isogawa S, Sekiguchi H (2007) In: Process modeling of IN718 for free forging. NUMIFORM, Porto

  8. Yuan H, Liu WC (2005) Mater Sci Eng A 408:281

    Article  Google Scholar 

  9. Wang Y et al (2009) J Alloy Compd 474:341

    Article  CAS  Google Scholar 

  10. Yang XH et al (2007) Trans Shenyang Ligong Univ 26:64 (in Chinese)

    Google Scholar 

  11. Chen LQ et al (2009) Acta Metall Sinica 45:1242 (in Chinese)

    CAS  Google Scholar 

  12. Zhang JM et al (2000) J Mater Proc Tech 1010:25

    Article  Google Scholar 

  13. Zhang HY et al (2010) Mater Charact 61:49

    Article  CAS  Google Scholar 

  14. Hu JP (1999) Numerical simulation of Superalloy In718 and Gatorized Waspaloy during hot working. Ph. D Dissertation, Steel Research Institute (in Chinese)

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Acknowledgements

This study has been supported by the National Natural Science Foundation of China with the Grant No: 50834008.

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Authors and Affiliations

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    M. Cheng, H. Y. Zhang & S. H. Zhang

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  1. M. Cheng
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  2. H. Y. Zhang
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  3. S. H. Zhang
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Correspondence to M. Cheng.

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Cheng, M., Zhang, H.Y. & Zhang, S.H. Microstructure evolution of delta-processed IN718 during holding period after hot deformation. J Mater Sci 47, 251–256 (2012). https://doi.org/10.1007/s10853-011-5792-1

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  • DOI: https://doi.org/10.1007/s10853-011-5792-1

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